Switching Between Unicast and Multicast by Considering Degraded User Experience in a Wireless Communication System

2. The method of claim 1, wherein the status of the MBS includes at least one of (1) a ratio of positive acknowledgement (ACK) to negative acknowledgement (NACK) in response to the MBS, (2) the fraction of NACK in response to the MBS, and/or (3) the fraction of ACK in response to the MBS.

3. The method of claim 1, wherein the status of the MBS includes at least one of status for a layer 1 feedback and/or status for a layer 2 feedback.

4. The method of claim 1, wherein the status of the MBS is generated by the DU based on feedback information from each of the first wireless device and the second wireless device in response to the provided MBS.

5. The method of claim 4, wherein the feedback information includes layer 1 basis feedback information or layer 2 basis feedback information in response to the provided MBS.

6. The method of claim 4, wherein the feedback information includes at least one of (1) Hybrid Automatic Repeat Request (HARQ) positive acknowledgement (ACK) information for the MBS, (2) HARQ negative acknowledgement (NACK) information for the MBS, (3) ACK information from radio link control (RLC) layer for the MBS, and/or (4) NACK information from RLC layer for the MBS.

7. The method of claim 1, the first switching message includes an identity (ID) of the MBS.

8. The method of claim 1, wherein the first switching message includes a Radio Utilization Efficiency for the MBS.

9. The method of claim 8, wherein the Radio Utilization Efficiency for the MBS includes at least one of (1) A: a total amount of radio resources to be used for the multicast transmission, (2) B: a total amount of radio resources to be used for unicast transmission for all wireless devices receiving the MBS, and/or (3) a ratio of A to B.

12. The method of claim 11, wherein the second switching message includes an identity of the MBS.

14. The method of claim 13, wherein the third switching message is transmitted based on that allocating radio resource for the third transmission is allowable.

16. The CU of the RAN node of claim 15, wherein the status of the MBS includes at least one of (1) a ratio of positive acknowledgement (ACK) to negative acknowledgement (NACK) in response to the MBS, (2) the fraction of NACK in response to the MBS, and/or (3) the fraction of ACK in response to the MBS.

17. The CU of the RAN node of claim 15, wherein the status of the MBS includes at least one of status for a layer 1 feedback and/or status for a layer 2 feedback.

18. The CU of the RAN node of claim 15, wherein the status of the MBS is generated by the DU based on feedback information from each of the first wireless device and the second wireless device in response to the provided MBS.

19. The CU of the RAN node of claim 18, wherein the feedback information includes layer 1 basis feedback information or layer 2 basis feedback information in response to the provided MBS.